‎السلام عليكم ورحمة الله وبركاته Ustadh who is marham to my wife for my side of the family? And who I’m I marham to? I have heard that my cousins and even her own cousins are non marham? جزاك الله خيرا

Your wife's mahrams from your side are only your father and grandfathers and your sons and their sons, so your brother, your uncles and your cousins are not, and the Prophet ﷺ said about the husband's relative, the in-law is death (agreed upon). From her side you are a mahram to her mother and grandmothers by the marriage contract alone, and to her daughter only after you have consummated the marriage with her mother, so her sister, her aunts and her cousins are not mahram to you.